While tickling can be deployed as just another source for extreme sensation during a fully consensual power exchange, to put it awfully stuffily, it also can be and often is misused. You see this most often with funny uncle scenarios, of course, where an adult uses tickling as an excuse both to touch and to humiliate a child and nobody thinks anything is amiss since, of course, it's all in good fun. I've heard a number of women say that their sexually abusive relatives or family friends also tickled them. And some ticklers of grown-ups pull the same shit on their victims: "What's the matter? It's just a game. Don't be a crybaby." It all comes down, of course, to whether or not you stop. You would never be so cruel as to keep tickling past the point of fun for the ticklee, right, and certainly not after being begged to cease? Right? If not, we have nothing further to discuss.
You may find a willing ticklee among the more usual devotees of flogging, play-piercing, and the like. You are unlikely to find someone who likes only tickling, but as I said at the top, if you only like one thing and can't have sex without it, you may need to talk to someone anyway.
See Andrea's other column at carnalnation.com.